Liquid-cooler.



vPatented May 3, v1910.

v uern/boa.

atkins/t James Allan J. ALLAN. LIQUID COOLER. APPLICATION FILED JULY 2e,1909.

Annazw a. GRAHAM co. PHotuLmmGnAvHgn; Hummm wif/names:

UNTTED sTATns PATENT ernten.

JAMES ALLAN, OF OMAHA, NEBRASKA, ASSIGNOR TO LARSEN-BAKER ICE MACHINECO., A CORPORATION 0F NEBRASKA.

LIQUID-COOLER.

To all whom it may concern:

Be it known that l, JAMES ALLAN, a citizen of the United States, and aresident of Omaha, in the county of Douglas and State of Nebraska,have'invented certain new and useful Improvements in Liquid-Coolers, ofwhich the following is a specification.

My invention relates to liquid coolers of the class in which liquid isflowed in a thin sheet or stream over a series of pipes through which ispassed ammonia or other refrigerant. In the usual cooler of this typethere is employed a flat coil or series of pipes connected by returnbends and arranged above each other, and over which the liquid to becooled is flowed by discharging the same from a perforated supply pipeonto the upper of the refrigerating pipes, flowing around said pipe andfalling onto the next, and so on throughout the series, being finallycaught in a tank arranged below the coil.

It is the object of my invention to provide a device having a capacityequal to that of a coil cooler but of a more compact structure so as tooccupy a minimum of floor space, and also having a minimum number ofjoints all of which are of such a nature 'that' they may be welded andmade absolutely permanent. By the reduced number of joints and thesmaller amount of material employed it is also possible to con structthe device more cheaply than the coil coolers.

A construction embodying my invention is shown in the accompanyingdrawings, in which- Figure l is a vertical sectional view, and F ig. 2is a transverse horizontal sectional view on the plane of the line -x ofF ig. l.

In carrying out my invention I provide a vertical cylindrical tank l,constructed of sheet metal, the lower part thereof being made withdouble walls between which is a packing 2 of heat insulating material,the top being provided with a removable cover 8, and the whole supportedabove t-he floor by legs t. The cooling device proper is disposed withinthe tank and is made up principally of the concentrically arranged tubesor shells 5, 6 and 7, which are preferably ordinary commercial wroughtiron pipe. The inner pipe 5 is of greatest length and has a cap 8 weldedin the top thereof and thereby made integral therewith. The

Specification of Letters Patent.

Application led July 26, 1909.

Patented May 3, 1910. Serial No. 509,742.

inner pipe is connected at the lower end thereof with the intermediatepipe 6 byY means of a ring 9 which is welded between the ends of thepipes and made integral with both of the same. Where the facilities arenot at hand for making the double weld, the ring may be welded to theintermediate pipe before assembling the parts, the inner side of thering and the end of inner pipe threaded, and the same screwed togetherin the assembling of the parts. The outer pipe 7 has a bottom cap lOwelded therein, and the upper ends of the outer and intermediate pipesare connected by means of the ring 11 which has an internal annularrecess 0r space formed therein and extending out at one side through acoupling iiange 12 to which is connected the discharge pipe orsuction-line 13 of the refrigerating circulatory system. The said upperends of the outer and intermediate pipes are preferably welded to theannular cap l1 but may be screwed therein where the facilities forwelding are not at hand. The supply pipe 14: or liquidline of therefrigerating circulatory system is connected with the inner pipe 5 atone side thereof and just below the cap 8,the flow of the refrigerantthrough said pipe being controlled by a valve 15. To the bottom cap l0of the outer pipe is connected the pipe 16, the passage through which iscontrolled by a valve 17, and the purpose of which is to draw o' anyimpurities carried by the refrigerant which may collect at the bottom ofthe pipe 7. I

The liquid supply pipe 18 is brought into the tank l near the topthereof and is eX- tended down into the space between the inner pipe 5and the intermediate pipe 6 to .a point near the bottom of said space,as indicated by the dotted lines in Fig. l. The liquid from said pipeflows upwardly through t-he space between the inner and intermediatepipes and, overflowing the annular cap 11, passes down over the outsideof the outer pipe 7 in a thin sheet or film, being received in the lowerpart of the tank l from which it is drawn olf through the pipe 19.

The direction of ilow of both the refrigerant and the liquid to becooled is indicated by arrows in the drawing. It will be obvious that bythe arrangement disclosed a simple, compact, and comparativelyinexpensive liquid cooler may be constructed, in which the liquid andthe refrigerant are brought into intimate relation throughout arelatively large area of the thin metal walls which separate them, andthat both the liquid and the refrigerant are spread into thin sheets sothat there is thek greatest opportunity for the 'rapid and effectiveexchange ofA heat between them.

Now,having described my invention, what I claim and desire to secure byLetters Patent is:

l. In a liquid cooling device, three verti cally disposed concentricallyarranged pipes, caps arranged to close the upper end of the inner pipeand the lower end of the outer pipe, annular means arranged to connectthe upper ends of the outer and intermediate pipes and the lower ends ofthe intermediate and inner pipes, means arranged to permit the flow ofa. refrigerant through the inner pipe and between the intermediate andouter pipes, and a liquid supply pipe arranged to discharge at thebottom of the space between the inner and intermediate pipes, so as tocause a How of liquid upward through said space, overflowing the annularmeans connecting the outer and intermediate pipes and iiowing down overthe outside of the outer pipe.

2. In a liquid cooling device, three vertically disposed concentricallyarranged pipes, caps arranged to. close the upper end of the inner pipeand the lower end of the outer pipe, annular means arranged to connectthe upper ends of the outer and intermediate pipes and the lower ends ofthe intermediate and inner pipes, means arranged to permit the flow of arefrigerant through the inner pipe and between the intermediate andouter pipes, a liquid supply pipe extending into and discharging at thebottom of the space between the inner and intermediate pipes, and a tankinclosing said pipes for the purpose described.

3. In a liquid cooling device, an insulated tank, a series of pipesarranged vertically within said tank, the said pipes being disposedconcentrically with each other and connected to form and inclose aninne-r space, an intermediate space and an outer space, the outer spaceconnecting with the inner space at the bot-tom thereof, refrigerantsupply and discharge pipes connected with the inner and outer pipesrespectively to permit a iow of refrigerant through the outer and innerspaces, and a liquid supply pipe extending into and discharging near thebottom of the intermediate space, the said in termediate space beingopen at the top so that the liquid may overflow and pass down over theoutside of the outer pipe into the tank.

In testimony whereof I have hereunto subscribed my name in the presenceof two witnesses.

JAMES ALLAN. Witnesses:

ROY G. KRATZ, I). O. BARNELL.

